CS 159 true/false labs 5-10

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The number of times the update action is executed is equal to the number of times the loop control expression is evaluated in a for loop.

false

The only way to complement a NOT operator is with another NOT operator.

false

The short-circuit method of evaluating logical expressions does not apply to loop control expressions.

false

With the use of pass by address it is now permissible for a function to be written to complete several sub tasks of the program.

false

This loop iterates 6 times: (i = 1; i <= 32; i * 2)

false, 5 times.

A function that passes at least one parameter by address must pass them all by address.

fasle

A counter-controlled loop may execute a constant number of inerations.

true

A function that does one and only one process is functionally cohesive

true

A limited amount of control structures are permissible in the main function to ensure that it is the main function which makes most of the function calls for a program.

true

A nested loop is a repetitive process contained inside of another repetitive process.

true

A piece of data is called logical if it conveys the idea of true or false.

true

A structure chart may show the data that is exchanged between functions.

true

A variable declared in the local declaration section of a function has a scope that extends until the end of that function.

true

According to the course standards a for loop should only be used with counter-controlled processes.

true

According to the course standards if all three expressions are not needed in a for loop then you should instead make use of a while loop for your pretest loop needs.

true

An iteration is one execution of all statements found inside the body of a loop.

true

An iterative solution involves the use of a loop to solve a repetition problem.

true

Array declarations will determine the type, name, and size of the array.

true

Arrays can be passed in two ways; by individual elements or the whole array.

true

Arrays must be declared and defined before they can be used.

true

Associated with a case label is zero or more executable statements.

true

C programmers use other types, such as integers, to represent logical data.

true

Complementing a condition is one way to potentially remove negative logic from an expression.

true

Control-forcing statements such as break, continue, exit, and the use of multiple return statements in a user-defined function are prohibited by course standards as mechanisms to terminate repetitive processes.

true

Elements of an array, themselves individual values of a given data type, are passed by value from calling to called function.

true

For a value to be potentially used as an index it must be an integral value or an expression that evaluates to such.

true

Functional cohesion is a measure of how closely the processes in a function are related.

true

Given the address of a variable the called function can access and manipulate the value of a variable in the calling function.

true

If a data value is 0 it is considered false, but any non-zero value is considered true.

true

In a fixed-length array the size of the array is known when the program is written.

true

In a post-test loop the minimum number of times that the statements found inside of the loop are executed is one.

true

In a pretest loop the control expression is evaluated before each iteration, including the first iteration.

true

In an else-if the if condition is evaluated first and additional else-if condition are evaluated until a condition is found to be true.

true

In downward communication (passing by value) it is only a copy of the data that is sent from the calling function to the called function.

true

Individual elements of an array can be passed by address through the use of the address operator.

true

Input validation is an example of an event-controlled problem.

true

Is it possible to indicate on a structure chart when a user-defined is called from within a section construct.

true

It is a good design practice to design a user-defined function such that it is testable apart from the rest of the program.

true

It is a good design practice to limit user-defined functions to only a single task.

true

It is a good design practice to not repeat the logic of one function in other functions of the program.

true

It is expected for many cases that the code for the validation of input be found in the same function that contains the prompt for input and scanf statement.

true

It is not possible to access a variable in the calling function by its identifier when inside the called function.

true

It is poor programming style to reuse identifiers within the same scope.

true

It is possible for the number of times a counter-controlled loop will iterate to depend on the value of a single variable expression.

true

It is possible to determine if any parameters are passed to a function by address based on the first line of the definition of the function (also known as the function header).

true

It is possible to determine if any parameters are passed to a function by address from the declaration statement of the function.

true

It is possible to update/change/alter the loop control variable of a for loop inside of its body.

true

Negative logic refers to any expression that begins with a NOT operator or that contains multiple NOT operators within.

true

No code is contained in a structure chart as it only demonstrates the function flow of the program.

true

No two switch case labels can represent the same constant expression value.

true

Objects with a global scope are visible (defined) everywhere in the program.

true

One approach to potentially make solving problems that require nested loops easier is to separate each repetitive process into its own function.

true

One benefit of pass by address is that it allows multiple changes to be made in a function and to have those changes available in the calling function.

true

Only the statements associated with the first true condition are executed in a multiway else-if construct.

true

Recursion is a repetitive process in which a function calls itself.

true

Recursion should not be used with evet-controlled processes as the result may be more function calls than the memory of the computer can accommodate.

true

Selection by itself is insufficient for input validation because it provides only a finite number of opportunities for the user to input valid data.

true

Similar to their required use in the if construct it is a course standard to always make use of { and } with all looping constructs.

true

The * and & operators are inverse operations of each other.

true

The action that is responsible for changing the result of the loop control expression from true to false is the loop update.

true

The asterisk (*) when used in a variable declaration indicates that such variables are not data variables but address (pointer) variables which can store the addresses of other variables in the program.

true

The asterisk has two different uses, declaring an address variable (pointer) and indirectly accessing the data (in the memory location to which the variable points).

true

The break statement results in the control of the program exiting the witch statement.

true

The called function cannot identify whether the value it receives comes from an array, an individual variable, or an expression that evaluates to the expected type.

true

The called function must declare a special type of variable known as a pointer to store a memory address that is sent from the calling function.

true

The case label represents an integral type value that is a possible result of the control expression.

true

The complement of the equal operator is not the equal operator.

true

The condition in a recursive function when which the recursive function calls stop is known as the base case.

true

The condition that determines whether the task to repeat is finished is known as the loop control expression.

true

The conditional expression has three operands and a two-token operator.

true

The contents of a loop have been identified to be repeated in a program.

true

The course standards limit the use of the break statement to only switch statements.

true

The do-while loop will terminate with a semicolon after its loop control expression.

true

The else does not have a condition associated with it.

true

The else is executed only when all previously evaluated conditions are false.

true

The expression if(a == 0) and if(a) are complements.

true

The expressions if(a != 0) and if(!a) are complements.

true

The first random number generated is based on a seed, either the default provided by the system or one specified by the programmer.

true

The index value represents an offset from the beginning of the array to the element being referenced.

true

The initiation of the loop control variable must take place outside of the body of a pretest loop.

true

The logical expression of an if...else construct must be enclosed in parenthesis.

true

The loop control variable is commonly a part of the loop control expression and the recipient of the loop update action.

true

The name of an array is a reference to the address of where it begins inside the memory of the computer.

true

The number of times that the loop control expression is evaluated is one more than the number of iterations in a pretest loop.

true

The random number function returns an integer between 0 and RAND_MAX, which is defined in the stdlib.h library as the largest number that rand can generate.

true

The scope of an object determines the region of the program in which it is visible (and defined).

true

The short-circuit method of evaluating logical expressions will stop evaluating the current expression as soon as the result can be determined.

true

The srand function creates the starting seed for a number series based on the value it receives.

true

The srand function must be called only once for each random number series.

true

The statements found inside of an if...else may be any statement, including another if...else construct.

true

The switch construct can only be used when the selection condition reduces to an integral expression.

true

The while loop requires the use of parentheses around the loop control expression.

true

There is no semi-colon that follows the logical expression of an if...else construct.

true

This for loop iterates 5 times: (i = 12345; i != 0; i /= 10)

true

This for lop iterates 10 times: for(i = 0; i < 10, i++)

true

To generate a random integer in a range x to y, we must first scale the number and then, if x is greater than 0, shift the number within the range.

true

To obtain the address of a variable use the address operator (&).

true

When accessing an array element the C language does not check whether the index is within the boundary of an array.

true

When attempting to print the result of a logical expression that is true as an integer the result will always be 1.

true

When only one data item needs to be returned to the calling function then we should use the standard return statement rather than passing a single parameter by address.

true

When the selection is based on a range of values, or the condition is not integral, we use the else-if for our multiway selection needs.

true

When the statements associated with one case have been executed the program flow continues with the statements for the next case.

true

When working with a parameter that has been passed by address it is unnecessary to use the & (address) operator in the scanf because the parameter already represents a memory location.

true

When writing a selection construct the most probable conditions should come before those that occur less frequently.

true

While each call to the rand function returns the next integer in the series, the srand function is a void function.

true

You can make use of x++, ++x, x += 1, and x = x + 1 interchangeably as the update (third) expression of a for loop to increment the loop control variable.

true

The complement of the greater than operator is the less that operator.

false

The dangling else logical error can be corrected by indenting the if and else the same number of spaces.

false

The following expression is used to generate a positive integer value in the range from x to y, rand() % (y - x) + x

false

The gcc complier as used in Vocareum this semester will permit a variable to be declared and initialized in the first expression of a for loop.

false

The logical OR (||) operator is true only when exactly one of it operands is true.

false

The maximum number of actions that can be associated with a switch case label is one.

false

In order for two, or more, repetitive processes to be considered nested they must appear in the same user defined function.

false

In this course you will be expected to validate for the input of both the range of acceptable value and the correct data type.

false

It is always a logical error to associate two switch case labels with a common set of actions.

false

It is never possible to determine if any parameters are passed to a function by address from an example call to the function.

false

Iterative solutions are always better then recursive ones

false

The AND and OR operators share the same level of precedence.

false

The address operator is not necessary in a scanf to accept input for an individual array element when using the indexing technique

false

Each rectangle on a structure chart represents the user-defined and standard library functions used in a program.

false

Each switch case label is the keyword case followed by a constant expression inside of single quotes.

false

If the number of values provided for initialization of an array is fewer than the size of the array then the remaining elements have no known value.

false

In an event controlled loop we know the number of times that the actions found inside the body of the loop will be executed.

false

A reasonable effort should be made to convert most while loops into for loops.

false

A structure chart should be created after your program has been written.

false

All functions that utilize pass by address must be void functions.

false

Conditional expressions cannot be nested as the resulting code becomes more complex.

false

Declaration and definition of an array will include a default initialization of all elements.

false


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