Question 1

Pass by name is included in all Algol60 descendants.

Accepted Answer

Not all Algol60 descendants include pass by name; for example, many adopted pass by value or pass by reference instead.

Question 2

If a pointer is passed by value,the procedure cannot modify the contents of the pointer.

Accepted Answer

Passing a pointer by value to a function allows the function to modify the contents of what the pointer points to, but not the address stored in the pointer variable itself.

Question 3

Pass by value is the default mechanism in C++ and Pascal.

Accepted Answer

In both C++ and Pascal, pass by value is the default mechanism for function parameters. This means that a copy of the argument is made and passed to the function, rather than passing a reference to the original argument.

Question 4

A procedure is a mechanism for abstracting a group of actions or computations.

Accepted Answer

A procedure is a programming construct that encapsulates a group of instructions or computations that perform a specific task. By defining a procedure, a programmer can reuse the same code at different points in a program, simplifying a program's design and making it easier to read and maintain.

Question 5

In C and Java,parameters passed by value behave as local variables of the procedure.

Accepted Answer

Parameters passed by value are treated as local variables within the procedure's scope. They are initialized with the value of the passed argument and any changes made to them within the procedure do not affect the original argument outside the procedure.

Question 6

Pass by value-result is also known as copy-in,copy-out.

Accepted Answer

Pass by value-result involves copying the input parameter into the function, modifying the copy, and then copying the modified copy back out to the original parameter. This is also known as copy-in, copy-out.

Question 7

In pass by name parameter passing,arguments are not evaluated until their actual use as parameters in the procedure.

Accepted Answer

In pass by name parameter passing, the arguments are not evaluated until their actual use as parameters in the procedure. This means that the expressions passed as arguments are evaluated only when they are used in the procedure, which can be more efficient than pass by value or pass by reference parameter passing in some cases.

Question 8

Pass by name can be described as an advanced inlining process for procedures.

Accepted Answer

Pass by name allows the procedure's code to be inserted in the calling statement, similar to what happens in inlining. Therefore, it can be considered an advanced form of inlining.

Question 9

You call a procedure by stating its name,together with arguments to the call.

Accepted Answer

This statement is true. To call a procedure, you must state its name followed by any arguments needed for the call.

Question 10

Pass by value implies that changes cannot occur outside the procedure through the use of parameters.

Accepted Answer

The answer of Pass by value implies that changes cannot...

Question 11

A procedure specification includes its name,the names and types of its formal parameters and its return type,if any.

Accepted Answer

This statement is true. A procedure specification includes its name, formal parameters' names and types, and its return type, if any.

Question 12

An activation record is a stored log recording each time a procedure or function is activated.

Accepted Answer

An activation record, also known as a call frame, is a data structure that contains information about the execution state of a procedure or function at a certain point in time, such as parameters, local variables, and return addresses, rather than a log of activations.

Question 13

When parameters are passed by value,the arguments are expressions that are evaluated at the time of the call,with the arguments' values becoming the values of the parameters during the execution of the procedure.

Accepted Answer

This is a correct statement that defines passing parameters by value.

Question 14

Procedures were first introduced when memory was scarce,as a way of splitting a program into small,separately compiled pieces.

Accepted Answer

Procedures were indeed introduced as a way of dividing a program into smaller sections that could be separately compiled and stored in memory.

Question 15

When you define a procedure,the parameters you list in the interface are the formal parameters.

Accepted Answer

When you define a procedure, the parameters you list in the interface are indeed the formal parameters. These formal parameters can be thought of as placeholders for the actual arguments that will be passed into the procedure when it is called.

Question 16

Pass by reference is also known as copy-restore.

Accepted Answer

Pass by reference does not involve making a copy of the original value, but instead uses a reference to the original value. "Copy-restore" does not accurately describe this process.

Question 17

A procedure declaration creates a constant procedure value and associates a symbolic name with that value.

Accepted Answer

A procedure declaration creates a constant procedure value and associates a symbolic name with that value. This value can then be called or passed around like any other value in the program.

Question 18

A call to a procedure transfers control to the beginning of the body of the called procedure.

Accepted Answer

This is true. A procedure is a set of instructions that can be called repeatedly, and when it is called, the control transfers to the beginning of the body of the procedure.

Question 19

Another name for activation record is stack record.

Accepted Answer

The answer of Another name for activation record is stack...

Question 20

An activation of a block cannot communicate with the rest of the program.

Accepted Answer

An activation of a block can communicate with the rest of the program through variables that are in the scope where the block is defined, allowing for interaction and data exchange.

Quiz 10: Control II - Procedures and Environments