Call Stack: 27 MCQs with answers

To manage function calls and local variables

The stack is used to manage function calls, including storing return addresses, parameters, and local variables.

Return address and parameters

Upon a function call, the return address and parameters are pushed onto the stack to allow the function to execute and return properly.

The stack frame is popped

When a function returns, its stack frame is popped off the stack, and control returns to the caller.

Last In First Out

LIFO stands for Last In First Out, which is the order in which items are added and removed from a stack.

Because it stores function call information

The stack is often called the call stack because it manages the sequence of function calls.

Stack

A stack is ideal because function calls follow a last-in-first-out order.

True

Each function call typically creates a new stack frame to hold its execution context.

To keep track of function calls and returns

The call stack keeps track of who called whom, what arguments were passed, and where to return, making it essential for function execution.

Function parameters and local variables

A stack frame holds the function's parameters, local variables, the return address, and saved registers.

Last In, First Out

LIFO stands for Last In, First Out, which describes how the stack operates by returning functions in the reverse order they were called.

The stack frame for that function is popped off

When a function returns, its stack frame is popped off, which removes the function's parameters and local variables from the stack.

When too many frames are pushed onto the stack

A stack overflow occurs when too many frames are pushed onto the stack, often due to infinite or very deep recursion.

It indicates where to return after the function finishes

The return address is crucial because it tells the program where to return after the callee function has finished executing.

For storing short-lived function call data

The stack is used for short-lived call bookkeeping, such as storing parameters and local variables during function execution.

Each recursive call pushes a new frame onto the stack

In recursion, each recursive call pushes a new stack frame, allowing the program to keep track of multiple calls.

Not having a base case in recursive functions

A common mistake that leads to stack overflow is failing to provide a base case in recursive functions, causing infinite recursion.

The call stack of active function calls

When a program crashes, a debugger can display the call stack, which shows the chain of active function calls leading to the crash.

A region of the stack containing function call information

A stack frame is the portion of the stack that holds the parameters, return address, and local variables for a single function call.

It supports recursion and nested calls

The stack's LIFO nature makes it ideal for managing nested function calls and recursion.

Push parameters, push return address, jump to function

Typically, parameters are pushed first, then the return address, and then control jumps to the function.

To point to the top of the stack

The stack pointer keeps track of the top of the stack, which changes as items are pushed or popped.

When the stack exceeds its allocated size

A stack overflow occurs when too many items are pushed onto the stack, exceeding its capacity, often due to infinite recursion.

By storing multiple return addresses and local variables

Each recursive call creates a new stack frame, allowing the function to maintain separate local variables and return addresses.

Global variables

Global variables are stored in a separate data segment, not in the stack frame.

It removes the top function's data and returns control

Popping a stack frame removes the top function's data and restores control to the calling function.

The stack frame remains, potentially causing a stack overflow

If a function never returns, its stack frame is not popped, leading to accumulation and possibly a stack overflow.

False

The direction of stack growth depends on the architecture; it can grow upwards or downwards.