Oracle 1Z0-829 Certification Sample Questions and Answers

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Oracle 1Z0-829 Sample Questions:

01. In which class or interface is the notify() method defined?
a) Thread
b) Object
c) Appendable
d) Runnable
 
02. An input parameter containing executable code is an example of which of the following?
a) Lack of encapsulation
b) Mutable code
c) Code corruption
d) Code injection
 
03. In which of these variable declarations will the variable remain uninitialized unless it is explicitly initialized?
a) Declaration of an instance variable of type int
b) Declaration of a static variable of type float
c) Declaration of a local variable of type float
d) Declaration of a static variable of type Object
e) Declaration of an instance variable of type int[]
 
04. Given that Thing is a class, how many objects are created and how many references are declared by the following code?
Thing item, stuff;
item = new Thing();
Thing entity = new Thing();
a) One object is created.
b) Two objects are created.
c) Three objects are created.
d) One reference is declared.
e) Two references are declared.
f) Three references are declared.
 
05. What is the correct order in which the following JDBC resources are closed?
a) Connection, Statement, ResultSet
b) Statement, ResultSet, Connection
c) Closure order is irrelevant.
d) ResultSet, Statement, Connection
e) Closure order is irrelevant when auto-commit mode is enabled.
 
06. Which of the following describes the meaning of the number 256 in the name of the SHA-256 algorithm?
a) A length of the resulting hash value
b) A length of a private key used for encryption
c) A length of a public key used for encryption
d) A length of the input value
 
07. How many of the following array declaration statements are legal?
int []aa[] = new int [4][4];
int bb[][] = new int [4][4];
int cc[][] = new int [][4];
int []dd[] = new int [4][];
int [][]ee = new int [4][4];
a) 0
b) 1
c) 2
d) 3
e) 4
f) 5
 
08. Which types cannot be declared as generic types?
Select the three correct answers.
a) Enum types
b) Static member classes
c) Any subclass of Throwable
d) Nested interfaces
e) Anonymous classes
f) Non-static member classes
g) Local classes
 
09. What is the value of the expression (1 / 2 + 3 / 2 + 0.1)?
a) 1
b) 2.1
c) 1.6
d) 2
e) 1.1
 
10. How do objects communicate with each other in Java?
a) They communicate by modifying each other’s fields.
b) They communicate by modifying the static variables of each other’s classes.
c) They communicate by calling each other’s instance methods.
d) They communicate by calling static methods of each other’s classes.

Answers:

Question: 01

Answer: b

Question: 02

Answer: d

Question: 03

Answer: c

Question: 04

Answer: b, f

Question: 05

Answer: d

Question: 06

Answer: a

Question: 07

Answer: e

Question: 08

Answer: a, c, e

Question: 09

Answer: e

Question: 10

Answer: c
Rating: 4.7 / 5 (97 votes)