Which of the following is a type of polymorphism in Java?

Consider the following statements in connection with deflection-type and null-type instruments: 1. Null-type instruments are more accurate than the deflection-type ones. 2. Null-type of instrument can be highly sensitive compared to a deflection-type instrument. 3. Under dynamic conditions, null-type instruments are less preferred to deflection-type instruments. 4. Response is faster in null-type instruments as compared to deflection-type instruments. Which of the above statements are correct?

A

1, 2 and 3

B

1, 2 and 4

C

1, 3 and 4

D

2, 3 and 4

Consider the following grammar and the semantic actions to support the inherited type declaration attributes. Let X1, X2, X3, X4, X5 and X6 be the placeholders for the non-terminals D, T, L or L1 in the following table: Production rule Semantic action D → T L X1.type = X2.type T → int T.type = int T → float T.type = float L → L1, id X3.type = X4.type addType(id.entry, X5.type) L → id addType(id.entry, X6.type) Which one of the following are the appropriate choices for X1, X2, X3 and X4?

A

X₁ = L, X₂ = T, X₃ = L₁, X₄ = L

B

X₁ = T, X₂ = L, X₃ = L₁, X₄ = T

C

X₁ = L, X₂ = L, X₃ = L₁, X₄ = T

D

X₁ = T, X₂ = L, X₃ = T, X₄ = L₁

What is the Message is displayed in the applet made by the following Java program?

import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}

A

A Simple Applet

B

A Simple Applet 20 20

C

Compilation Error

D

Runtime Error

What is the length of the application box made by the following Java program?

import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}

A

20

B

50

C

100

D

System dependent

What is the length of the application box made the following Java program?

import java.awt.*;import java.applet.*;public class myapplet extends Applet{ Graphic g; g.drawString("A Simple Applet", 20, 20); }

A

20

B

Default value

C

Compilation Error

D

Runtime Error

What is the length of the application box made in the following Java program?

import java.awt.*;import java.applet.*;public class myapplet extends Applet { Graphic g; g.drawString("A Simple Applet",20,20); }

A

20

B

Default value

C

Compilation Error

D

Runtime Error

What is the length of the application box made in the following Java program?

import java.awt.*;import java.applet.*;public class myapplet extends Applet{ Graphic g; g.drawString("A Simple Applet",20,20); }

A

20

B

Default value

C

Compilation Error

D

Runtime Error

A UNIX user named Bob wants to replace his chess program with a new one, but he is not sure where the old one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using the command: java -classpath /test:/home/bob/downloads/*.jar games.Chess Bob's CLASSPATH is set (at login time) to: /usr/lib:/home/bob/classes:/opt/java/lib:/opt/java/lib/*.jar What is a possible location for the Chess.class file?

A

\/test\/Chess.class

B

\/home\/bob\/Chess.class

C

\/test\/games\/Chess.class

D

\/user\/lib\/games\/Chess.class

Which of the following is a type of polymorphism in Java Programming?

A

Multiple polymorphism

B

Compile time polymorphism

C

Multilevel polymorphism

D

Execution time polymorphism

Consider the following grammar (that admits a series of declarations, followed by expressions) and the associated syntax directed translation (SDT) actions, given as pseudo-code: P → D* E* D → int ID {record that ID.lexeme is of type int} D → bool ID { record that ID.lexeme is of type bool} E → E1 + E2 {check that E1.type = E2.type = int; set E.type := int} E → !E1 {check that E1.type = bool; set E.type := bool} E → ID {set E.type := int} With respect to the above grammar; which one of the following choices is correct?

A

The actions will lead to infinite loop.

B

The actions can be used to correctly type-check any syntactically correct program.

C

The actions can be used to type-check syntactically correct boolean variable declarations and boolean expressions.

D

The actions can be used to type-check syntactically correct integer variable declarations and integer expressions.

Which of the following is a type of polymorphism in Java?

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