Encapsulation means hiding of data from the inside view.

Encapsulation can be achieved by proper use of modifiers.

Abstraction is a process like generalization.

Abstraction Is closely associated with encapsulation.

All of the above are true statements.

Linear search is slow as compared to binary search.

Linear search requires sorted data.

Linear search is not efficient with large data.

The complexity of binary search is O(log n).

Only (1), (3) and (4) are true.

Border layout

Grid layout

Flow layout

Both (2) and (3)

None of the above

Quick sort requires additional memory as compared to merge sort.

The average case complexity of merge sort is the same as quick sort.

The worst case complexity of quick sort and merge sort are also the same.

All of the above

Only (2) and (3).

ClassCastException

NullPointerException

ArrayIndexOutOfBoundsException

IllegalArgumentException

None of the above

readLine()

read()

write()

both (1) and (2)

none of the above

Throwable is the superclass of all exception classes in Java.

Stack overflow is an example of runtime exception.

Checked exceptions occurr due to user error.

Finally clause is used to free the resources allocated by the methods in the beginning of the program.

All of the above

Overloading occurs in the same class.

In method overriding, the return type of the method is different.

Final methods can not be overridden.

All of the above

Only (1) and (3) are true statements.

It determines the relationship between the two objects such as one-to-one, one-to-many etc.

It determines the complexity of the objects after combining them.

It determines the relationship between the objects in a directional line and shows the has-a relationship.

It hides the implementation details of the system.

None of the above

valueOf()

toString()

toSource()

both (1) and (2)

none of the above

It is responsible for the communication among the input/output devices, obtains the instruction from memory and manage all the units of the computer.

It does not store data.

It is responsible for arithmetic operations in the computer.

Only (1) and (2)

(1), (2) and (3) all are true.

Prompt dialog box

Alert dialog box

Confirm dialog box

Both (1) and (3)

None of the above

TreeMap is the class of Map interface.

HashMap inherits SortedMap interface.

HashMap is not synchronised.

Only (1) and (3) are true.

(1), (2) and (3) all are true.

The wrapper classes do not contain any constructor.

All the methods of a wrapper class are static in nature.

The wrapper class for float is java.lang.Float.

Wrapper classes are contained in java.lang package.

All of the above

Asymmetric key encryption provides message authentication.

Symmetric key encryption uses less computer resources.

Symmetric key encryption has too many keys.

All of the above

Only (1) and (2) are true.

abstract V get(Object key)

abstract V put(K key, V value)

abstract Enumeration keys()

abstract int size()

none of the above

It provides consistency in data.

It provides concurrency control.

It provides security of data.

It reduces redundancy of data.

All of the above

It is the total number of processes executed per time unit.

It is the total time taken by the process from submission to its completion.

It is the time taken by a the first response produced from the request was submitted.

It is the time taken by the process to remain in the ready queue.

None of the above

A digital certificate is used to identify the authentication of a user.

A digital certificate uses public key.

A digital signature is used to verify the data.

Credit card is an example of digital certificate.

All of the above

HashMap

HashSet

Dictionary

BufferredReader

None of the above