CUET LEVEL 2 CHAPTER STACK

What is the position of the "Andheri" in the following list:

names=[Bandra, Thene, Andheri, Colalk"]

• 0

• 1

• 2

• 3

Answer explanation

Andheri appears 3rd in the list but indecing starts from 0 so names [2] will display Andheri

What output will this code produce?

colours. append("blue")

colours. append("green")

colours. append("red")

print(colours[2])

• blue

• green

• red

• error

Answer explanation

Three colours are appended as blue, green, red. The red colour is at the 3rd position and according to indecing at the 2nd position so print (colours[2]) will displays red as its output.

what would this code do?

list=['Delhi', 'Mumbai', 'Chennai',' Kolkata']

print (list. pop())

• Remove 'Kolkata' from the list

• Remove 'Delhi' from the list

• Remove 'Kolkata' from the list and print it out to the shell

• An error

Answer explanation

The function pop() returns the elements from the list whole removing it from the list. Thus it removes Kolkata from the list & prints it out of the shell

Which colour will be replaced with yellow?

colour=["red", "green", "blue" ]

colour[1]="yellow"

print(colour)

• red

• green

• blue

• none, yellow will be added to the list

Answer explanation

In the existing list colour[1] belongs to green . so after colour [1]="yellow" the new list will be colour=["red", "yellow", "blue"]

This list contains items of what data type? list=[1,4,6]

• string

• boolean

• float

• interger

Answer explanation

String means a sequence of character, Boolean means True or False Float means decimal numbers like 13.2 , 45.6. etc and Integers means 1,2, -7, etc. Thus the list contains integers

Which symbols are used to open and close a list?

• ( ) round brackets

• { } curly brackets

• [ ] square brackets

• " " speech marks

Answer explanation

The square brackets [ ] are used to enclose the items of the list

The prefix form of A-B/(C * D^ E) is

• -/*ACBDE

• -A/B* C ^ DE

• -ABCD*^DE

• -A/BC*^DE

Answer explanation

The solution of infix expression A-(B/C*D^E)) to prefix is : -A(B/(C*D^E))

-A/B*C^DE. Thus prefix expression is -A/B*C^DE

The data structure required to check whether an expression contains balanced parenthesis is

• stack

• Queue

• Array

• Tree

Answer explanation

This is a simple data structure in which elements can be added & removed in a specific order In other words it follows a LIFO(Last In First Out) or a FILO(First In Last Out) structure

To print a list called fruitList we use

• print(fruitList)

• list(print)

• fruitList.print( )

• fruitList(print)

Answer explanation

The print() method is used to get the output on the screen so print( ) method with list name will display the contents of the list

When a stack is full and no element can be added it is called on__________

• overflow

• extraflow

• out of range

• underflow

Answer explanation

Overflow is the condition in which there is no memory left to accommodate a new item in a fixed size stack