ArrayList is thread-safe whereas Vector is not thread-safe.
True
False
HashMap permits null values and only one null key.
IOException is a type of checked exception.
Immutable objects are automatically thread-safe.
An object becomes eligible for Garbage Collection when there are very few threads that can access it.
There is only one way to create threads i.e. Implement the Runnable interface
this keyword can't be assigned null value
PHP is a widely used ……………. scripting language that is especially suited for web development and can be embedded into html
Open source general purpose
Proprietary general purpose
Open source special purpose
Proprietary special purpose
mysql_connect( ) does not take following parameter
password
user ID
database name
database host
Which of the following method sends input to a script via a URL?
Get
Post
Both
None